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Java GraphTraversal output Gremlin query

How to output Gremlin query from a Java GraphTraversal object? The default output (graphTraversal.toString()) looks like [HasStep([~label.eq(brand), name.eq(Nike), status.within([VALID])])] which is not easy to read.

Solution

  • Gremlin provides the GroovyTranslator class to help with that. Here is an example.

    // Simple traversal we can use for testing a few things
Traversal t = 
  g.V().has("airport","region","US-TX").
        local(values("code","city").
        fold());


// Generate the text form of the query from a Traversal
String query;
query = GroovyTranslator.of("g").
        translate(t.asAdmin().getBytecode());

System.out.println("\nResults from GroovyTranslator on a traversal");
System.out.println(query);

    This is taken from a set of examples located here: https://github.com/krlawrence/graph/blob/master/sample-code/RemoteWriteText.java